Finding the Fourth Proportional to 3,764.40, 5,200.77 and 2,591.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,764.40 : 5,200.77 = 2,591.72 : x
2. Step 2: Convert to fraction form
   3,764.40/5,200.77 = 2,591.72/x
3. Step 3: Cross multiply
   3,764.40x = 5,200.77 × 2,591.72
4. Step 4: Simplify right side
   3,764.40x = 13,478,939.62
5. Step 5: Solve for x
   x = 13,478,939.62/3,764.40
6. Step 6: Final answer
   x = 3,580.63